Nervous system of an insect

1. Importance of insect nervous system

IMPORTANCE OF INSECT NERVOUS SYSTEM

2. Structures of Axons

STRUCTURES OF AXONS
Axons are extended regions of the neuron cell membrane. It
starts from a portion of the cell body, known as the axon
hillock. From there, the axon extends towards the target cell to
what is known as the terminal. Along the cell membrane of
the axon will be ion channels and ATP-driven pumps that will
regulate ion concentrations within the axon.

3. Termite  

TERMITE
Termite (order Isoptera), any of a group of cellulose-eating
insects, the social system of which shows remarkable
parallels with those of ants and bees, although it has evolved
independently. Even though termites are not closely related to
ants, they are sometimes referred to as white ants.

4. Protocerebrum

PROTOCEREBRUM

5. Protocerebrum

PROTOCEREBRUM
The optic lobes of the fly (an insect with particularly good
vision) contains about
76% of the brain's neurons. The optic lobe connects directly to
the sensory cells (retinula cells) in the retina of the compound
eye. It contains three distinct regions (neuropils): the lamina,
medulla and lobula, where processing of visual signals
begins. The protocerebrum also receives inputs via the ocelli,
when present, via the ocellar nerves.

6. Deutocerebrum

DEUTOCEREBRUM
This consists of two nerve centres - the main antennal lobe
(AL) and the smaller antennal mechanosensory and motor
centre (AMMC) or dorsal lobe. The AL receives inputs from the
third (terminal) antennal segment (the flagellum, which is
made-up of sub-segments called flagellomeres) via the
antennal nerves. It contains from less than 10 to more than
200 sub-centres called glomeruli (singular glomerulus).